Set is complete with master panel,
Enter the fascinating world of electronics . . even build an AM
radio receiver, telegraph, electric light alarm and telephone amplifier.
Or monitor a nursery or sickroom. Create 30 useful devices by just
assembling the parts and attaching wires to the master unit. Unit is
high-impact styrene. Set includes printed-circuit 4-transistor audio
amplifier, transistorized transmitter circuit, phonograph pick-up arm
with sapphire-tipped needle cartridge. Printed circuit component
board with phase switch, on-off volume control, variable condenser,
speakers, remote speaker housing, motor and speed control parts,
tools. Uses 4 "AA" batteries and one 9-volt battery, order packages
below. Instructions. Buy it the easy way- order by phone.
24081C-Shipping weight 4 pounds .. . . ... . . ...... Set $16.88
Make 34 working toys wi th Electric Bu ild-it set
Manual shows you how to put together a traffic signal, dune buggy
and other fun projects. Set includes 2 motors, working panels, buzzer
unit, tools, bulbs, wiring and etching tool. Metal and plastic. Uses 2
"AA" and 2 "D" batteries, order packages below.
24082C-Shipping weight 3 pounds ...................... $8.84
Batteries for sets on this page.
8403-9-volt Batteries. Pkg. of 2. Shpg. wt. 8 oz.... Pkg.
8402-"AA" Batteries. Pkg. of 6. Shpg. wt. 6 oz.... Pkg.
8405-"D" Batteries. Pkg. of 6. Wt. 1 lb. 8 oz... . .. Pkg. 1.49
Weather Station Outfit
For amateur meteorologists. Predict temperature, wind velocity and precipi–
tation. Take readings indoors and make your forecast. Flashing neon lights
on board show wind speed, direction. Wired electrically to anemometer and
wind vane units outside. 100 ft. of wire.
Includes barometer, sling psychrometer, rain gauge, forecasting manual. cloud
chart. Low-amp. power cord plugs into any 110-120-volt, 60-cycle AC outlet.
24043-Shipping weight 1 pound 12 ounces...... . .... . .. . .... Kit $9.88
Science Fair Electronic Kits
Crystal Radio Kit
An easy-to-build radio that uses the
same type circuitry that Marconi used
for the first radio transmissions. Tunes
AM broadcasts. Comes complete, in–
cluding a quality crystal diode for clear
sound- and it can't wear out. Plastic
radio panel about
Earphone included. Needs no batteries.
Shipping weight 8 ounces,
24072 ....... . .... . . . .. Kit $3.95
A great " first kit" for learning bow to
build electronic items. This radio kit
tunes in the entire AM band and works
on batteries or solar energy. No solder–
ing necessary. Set includes parts, ear–
phone, solar cell, detailed manual. Plas–
tic panel, about
desired, order 9-volt battery package
below at left. (Battery may be used
when solar power is not present.)
24071- Wt. 8 oz........ Kit $5.95
10 easy-to-build working projects using
all solid state circuitry. No soldering
needed. Includes 18-page manual, solar
cell, earphone, transformer, transistors,
tuning capacitor, more. Cardboard, plas–
tic and metal, 14xllx2 inches. Uses l
"AA" battery not included, order pack–
age below left.
24069-Wt. 1 lb. 8 oz. . . Kit $8.95
Analog Computer Kit
Analog-type instrument with solid-state
circuitry allows you to perform difficult
operations in multiplication, division,
square and cube roots, logarithmic func–
tions, reciprocals. Has 2 sensitivity
ranges. Includes manual, conversion
tables, all parts. Plastic, 15x9x3 inches.
Uses one 9-volt battery not included,
order package at left.
Shipping weight 1 lb. 15 oz.
2407 .... . ..... . .. . . .. Kit $19.95